<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>James G. Rankl</dc:creator>
  <dc:date>1982</dc:date>
  <dc:description>This report describes a method to estimate infiltration rates of soils for use in estimating runoff from small basins. Average rainfall intensity is plotted against storm duration on log-log paper. All rainfall events are designated as having either runoff or nonrunoff. A power-decay-type curve is visually fitted to separate the two types of rainfall events. This separation curve is an incipient-ponding curve and its equation describes infiltration parameters for a soil. For basins with more than one soil complex, only the incipient-ponding curve for the soil complex with the lowest infiltration rate can be defined using the separation technique. Incipient-ponding curves for soils with infiltration rates greater than the lowest curve are defined by ranking the soils according to their relative permeabilities and optimizing the curve position. A comparison of results for six basins produced computed total runoff for all events used ranging from 16.6 percent less to 2.3 percent more than measured total runoff. (USGS)</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/wri8176</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey, Water Resources Division,</dc:publisher>
  <dc:title>An empirical method for determining average soil infiltration rates and runoff, Powder River structural basin, Wyoming</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>